¿Qué razones explican el cambio ocurrido en nuestro país durante el siglo xx, en la distribución de la población?

Which of the following statements most accurately describes the requirement for the documentation of minors’ assent to participate in research? parents must approve written documentation.documentation is required unless waived by an irb.to protect minors documentation is always required.federal regulations do not require the documentation of minors’ assent.